<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base\database;

interface IQuery
{
  /**
   * @return \crcl\base\database\query\ISelect
   */
  public static function select();

  /**
   * @return \crcl\base\database\query\IInsert
   */
  public static function insert();

  /**
   * @return \crcl\base\database\query\IUpdate
   */
  public static function update();

  /**
   * @return \crcl\base\database\query\IDelete
   */
  public static function delete();

  /**
   * @return \crcl\base\database\query\IReplace
   */
  public static function replace();

}

class Query extends \crcl\base\instance\factory implements IQuery
{
  const TYPE_SELECT = 'select://';
  const TYPE_INSERT = 'insert://';
  const TYPE_UPDATE = 'update://';
  const TYPE_DELETE = 'delete://';
  const TYPE_REPLACE = 'replace://';

  public static function select()
  {
    return self::getInstance(self::TYPE_SELECT);
  }

  public static function insert()
  {
    return self::getInstance(self::TYPE_INSERT);
  }

  public static function update()
  {
    return self::getInstance(self::TYPE_UPDATE);
  }

  public static function delete()
  {
    return self::getInstance(self::TYPE_DELETE);
  }

  public static function replace()
  {
    return self::getInstance(self::TYPE_REPLACE);
  }

  /** PROTECTED ***********************************************************************************/

  protected static $sFactoryDirectory = 'query';
  protected static $aFactoryAllowedTypes = array('insert', 'select', 'update', 'delete', 'replace');
}